Tire-forming core



K. O. B. TEXTORIUS.

TIRE FORMING CORE. APPLICATION man MAY 21. I921.

1,403,044, Patented Feb. 28, 1922.

2 SHEETS-SHEET l.

K. 0. B. TEXTORIUS.

TIRE FORMING CORE.

APPLICATION FILED MAY 21. 1921.

Patnted Feb. 28, 1922.

2 SHEETS-SHEET 2- wwutoz Kiwi QB irfoztz'ur inure!) STATES PATENT OFFICE.

nitrite o. B. rnx'ronios, or new YORK; n. Y., essrenoli TO TEX ENGINEERING oonronarrow, on NEW YORK, N. Y.

TIRE-FORMING COR-E.

Appllcatlon May 21,

To all whom it may concern:

Be it known that I KNUT 0'. B. TEXTO- runs, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State oi": New Yorln-havc invented certain new and useful Improvements in Tire-Forming Cores, of which the following is a specification.

This invention relates to an improved tire forming core and in its broadest aspect coinprehends a collapsible core of this character including a plurality of relatively movable sections which are so constructed and connected to each other that a maximum of strength and. durability is obtained.

It is the primary object of the present invention to provide a collapsible core having a plurality of relatively movable sections connected to each other by concealed hinges. These hinges are so constructed and arranged that they are wnolly disposed within the area of the core body thus eliminating parts projecting from theperipheral face of the core which are liable to be broken oil or so bent or distorted as to render the core practically useless.

It is also an additional object of this invention to provide a key section adapted to be assembled with the hingedly connected core sections so that said sections together form a continuous annular core, and means coacting with. the opposed ends of the several core sections for effectively resisting lateral pre. sures in the direction of the core axis and preventing the relative displacement of said sections so that they are at all.

times retained in true circumferential alignment with each other.

Specifically, the present improvement contemplates a collapsible core which is particularly designed "for use in connection with machines for making; cord tires, such for instance is disclosed in my co-pending application Serial No. 473.087, filed of even date herewith. To this end, in one embodiment of the inventioml provide each section of the core inwardly of the cylindrical. body thereof concentric longitudinal flanges projecting from opposite sides of the core. When the core sections are in their operative positions to provide a continuous annular. core structure, these flanges are in circumferential alignment with each other and provide continuous annular seats upon which the ends of the cord. layer arranged upon the Specification of Letters Patent.

Patented Feb. 28,, 1922.

1921. Serial No. 473,088.

cylindrical body of the core are adapted to be disposed and to which the cord ends may be securely clamped. u

. With the above and other objects in view. the invention consists in the improved col lapsible tire forming, core and in the form, construction and relative arrangement of its several parts as will be hereinafter more tully described illustrated in the accompanyng drawings andsubsequently incorporated in the subjoined claims.

In the drawings wherein I have illustrated one desirable and practical embodiment of the invention andv in which similar reference characters designate corresponding parts throughout the several views. F gure is a plan view of the improved core showing the severalparts thereof prop- .rly assembled into annular form, certain portions being in section to more clearly illustrated the construction; I

Figure 2 is a transverse section taken on the line 2-2 oiiFigure 1;

Figure 3 is a section taken on the line 3' 3 of Figure 1;

Figure 4: is a fragmentary longitudinal section taken on the line of Figure 1;

Figure 5 is an enlarged detail fragmeir tar v section illustrating the locking ring and the mannerin which it coacts with the core sections;

Figure 6 is a plan view showing the hingedly connected sectionsot the core collapsed or folded;

Figure is a plan vlew of the key section of the core, and I Figure 8 is an inverted plan view of the locking ring.

Referring in detail tothe drawings, 5, 6 and 7 respectively, indicate three core sections, the section 5 being; comparatively long while the section 6 is of somewhat less circumterential length and the section '7 ap preciably shorter than the section-5;- However, the length of these core sections is more or less arbitrary and a greater or less number of the core sections might be used if desired. The core sections 5; 6 and 7 are of identically the same cross-sectional form, each section having a hollow spherical body portion 8, the inner side of which is provided with. a centrally located circum terentially continuous laterally projectingweb 9 extending in a radial alane'coincident with the axis of the core b0 y 8. As herein shown, this web has a longitudinally continuous flange 10 on each side thereof, said flanges being disposed in concentric relation to the core body 8 and projecting from the web 9 in substantially parallel relation to the radial axis of the core.

Inwardly of the flanges 10, the web 9 has a longitudinal groove or channel 11 formed in one face thereof, such channel being concentric to the adjacent flange ll). The outer side wall 12 of the groove or channel 11 is obliquely inclined outwardly from the base wall of said channel and the inner side wall 13 of the channel is likewise inclined outwardly from the base wall thereof. At the opposite side of the web 9, a second flange 14: is formed thereon and is spaced inwardly from the flange 10 and in concentric relation therewith. With the latter flange 14 suitable lifting means is adapted to be engaged whereby the core may be conveniently transported from place to place.

At the inner side of the core section 5 and at each end thereof the inner portions of the core section including the web 9, the flanges 10 and flange 1d, are extended beyondthe end face of the core body 8 as indicated at 15 and these extensions are recessed or mortised as indicated at 16. The inortises 16 receive longitudinally projecting cars 17 on one end of each of the core sections 6 and 7 respectively. These ears and the spaced-parts of the extensions 15 are provided with openings which receive the hinge pintles 18. The ends of these hinge pintles are countersunk, one end thereof'in the base wall of the groove'or channel 11 and the other end in the face of one of the parts 15. It will be observed from a comparison of Figures 2 and 3 of the drawings that the flanges 14: do not extend upon the hingedly connected projections 15 and 17 of the core sections. It will also be noted that these hinged lugs or projections 15 and 17 are located wholly within the transverse area of the core structure and no parts thereof project from the In the walls 19 of the core section 5 the elliptical shaped interlocking lugs 20 are fixed by means of the pins 21 extending transversely through the wall 19 and through an opening in the lug. These lugs aredisposed in a plane parallel with the core section andcoincident with the axis of the body portion 8. One-half of each of the elliptical lugs project beyond the end face of the core section and are adapted for engagement with a correspondingly shaped recess or pocket 22 formed in the opposed ends of the core sections 6 and 7 respectively when the sections are arranged as seen'in Figure 1.

The key section 23 of the core is of the same cross-sectional form as the hingedly connected sections 5, 6, and 7, the body portion thereof being likewise closed at its opposite ends by the walls 24. The end faces 25 of this key section extend in converging relation towards each other from the inner to the outer side of said core section as clearly shown in Figure 7 and the opposed end faces 26 of the core sections 6 and 7 are correspondingly inclined and converge towards each other when the several hingedly connected sections are-disposed in circumferential alignment. 7

The end walls 2a of the key section are provided with the transversely extending recesses 27 which gradually increase in depth from their inner to their outer ends, the lat ter ends of said recesses opening upon the outer peripheral face of the core section. In the walls 19 of the free ends of the core sections 6 and 7 the wedge shaped keys 28 are fixed upon the pins 29. These keys 28 and the key lugs 20 retain the several sec tions of the core in'true circumferential alignment and prevent their relative displacement by pressure exerted against opposite sides of the core sections. These key lugs thus prevent the possible distortion of the hingedly connected projections 15 and 17 of the core sections.

In assembling the several sections of the core, after the two sections 6 and 7 have been swung outwardly'into circumferential alignment with the intermediate section 5, the key section is disposed between the sections 6 and 7 and moved outwardly in a radial direction between the end faces 26 of said core sections. The end'faces 25 of the key section'exert a gradually increasing frictional wedging action against the end faces 26 as the key lugs 28 carried by the sections 6 and 7 move into the recesses 27 of the key section. This wedging action continues until the inner and outer peripheral surfaces of the key section 23 are brought into circumferential. alignment with the correspondingsurfaces of the sections 6 and 7 and during this movement said latter sections are expanded outwardly into proper circumferential alignment with the intermediate section 5 and with the opposed end faces of thesections 5,6 and 7 in tight abutting con tact with each other. Thus there is produced a continuous annular core structure the several core'sections are in perfect cir- Cir cumferential alignment with each other and of unbroken continuity.

The several sections of the core may now be easily, quickly and securely locked together against all possibility of accidental collapse by means of the locking ring 30. This ring, as shown in Figure 5 of the drawings, has a body portion provided with a transversely inclined outer face 31. The inner face 32 of this ring is also transversely inclined, but the inclination of said inner face is appreciably greater than that of the outer face 31 of the ring with respect to ring axis and said inner face 82 is inclined in the opposite direction with respect to said outer face. In other words, the inner and outer faces of said ring are convergently inclined on different lines with respect to the central median plane of the ring which is parallel to the ring axis. Accordingly it will be seen that the said ring tapers in thickness and may, therefore, be easily and quickly inserted into the aligned grooves or channels of the several core sections. When the ring is thus applied, the outer face 31 thereof has sliding frictional contact with the wall 12 of the channel 11, the degree of inclination of said face of the ring and the channel vrall being substantially the same. The inner face 32 of the ring however, has

av much greater degree of inclination than the inner wall 13 of the channel so that the ring face 32 has frictional contact only upon the corner formed at the meeting edge between the channel wall 13 and the face of the web 9. Asthe ring is forced into the channel 11 it will tend to rock upon this corner as a fulcrum and the opposite or outer face of the ring will thereby be urged into tight frictional contact against the ch annel wall 12. Owing to this single annular line of contact of limited area between the inner face of thering 80 and the inner wall of the channel 11, wear of the ring is more effectively taken up or compensated for and a tight connection assured at all times.

- The body of the rin 80 is further provided Withan annular groove or channel which opens upon the relatively narrow edge face of said ring which is opposed to the base wall of the channel 11 when the lockingring is inserted. This channel provides for elasticity in the ring structure and obviates the tendency of displaced air to resist the entrance of the ring into the channel, which air under expansion, tends to force the ring outwardly from the channel. At the other or wider edge of the ring, an inwardlyextending annular flange 3% is formed thereon which provides convenient means whereby the locking ring may be readily displaced and removed from the channels 11 when it is desired to collapse the sections of the core.

It will be apparent that when the several.

core sections have been properly assembled and locked together by means of the ring 30, said core may be properly handled and moved from place to place without danger of displacement of the key section 23 and the collapse of the core structure. Such collapse may, however, be easily effected by simply removing the locking ring 30 and then forcing the key section 23 radially inward and removing said section. The sections 6 and 7 can then be relatively folded into compact relation as seen in Figure 6 of the drawings. These hingedly connected core sections constructed in the manner above explained will withstand very hard usage and together with the key section, can be easily and quickly assembled into the complete annular core structure.

From the foregoing description taken in connection with the accompanying drawings, the construction, manner of use and several advantages of my improved tire forming core will be fully understood.

lVhile I have herein referred to a core of peculiar cross sectional form especially designed for use in connection with machines for building cord tires it will be readily understood that the core may also be produced in various other cross sectional shapes.

Thus I have herein shown the core as provided with the flanges 10 upon which the ends of the cord layer applied upon the body 8 are adapted to be clamped and also with the concentric grooves 10 at the'outer side of each flange 10 and at the base thereof which are adapted to receive suitable beads applied to the marginal portions of the cord layers. It will be apparent, however, that insofar as the means for connecting and assembling the several sections of the core is concerned, these features might be eliminated. Also the invention, as above described is susceptible of many modifications in the form, construction and arrangement of its several parts and the essential features thereof may be incorporated in numerous alternative structures. Accordingly, I reserve the privilege of adopting all such legitimate modifications as may be fairly embodied within the spirit and scope of'the invention as claimed.

1 claim:

1. A. tire forming core comprising a plurality of arcuate sections, hinges inseparahly connecting said sections to each other, a key section coacting with certain of the first named sections to position the core sections in circumferential alignment with each other. and a single locking means common to all of said core sections for holding the same against relative displacement.

2. A tire forming core comprising a plurality of arena-to sections. concealed hinges, inseparably connecting said sections to each other and disposed wholly within the area of the core structure, a key section coacting with certain of the first named sections to position the core sections in circumferential alignment with. each other, means coacting with the abutting ends of the several core sections to resist pressures against opposite sidesof the core in the line of its axis, and locking means common to all of the core sections for holding said sections against relative radial displacement.

3. A tire forming core comprising a plurality of arcuate core sections, hinges inseparably connecting said core sections to each other at their inner sides and wholly concealed within the core structure whereby the inner faces ofthe core sections are substantially unbroken by projecting parts of the hinges when said sections are disposed in circumferential alignment, lugs fixed in the ends of one of said core sections, the opposed ends of the other core sections having recesses to receive said lugs, additional lugs fixed in the ends of he latter core sections and projecting from the end faces thereof, a key section adapted to be positioned between said ends of the latter core sections and frictionally coacting with the end faces thereof to position the several sections in, circumferential alignment with each other, said key section having I cesses in its opposite end faces to receive the last named lugs, and means common to all of said core sections to lock th same against relative radial displacement.

4%. A collapsible tire forming core comprising aplurality of hingedly connected inseparable core sections and a key section adapted, when assembled, to form a continuous annular core structure, each of said core sections having a longitudinal groove in one side thereof, and an annular locking ring havin means to frictionally coact with the walls of said grooves when the core sec tions are assembled to lock the several secposed in alignment with the connecting hinges between the core sections transversely of said sections, and an annular locking ring having means to frictionally coact with the walls of said grooves when the core sections are assembled to lock the several sections of the core against relative radial displacement.

6. A collapsible the forming core comprising a plurality of hingedly connected inseparable'core sections and a key section,

nausea-i said sections when assembled, forming-a continuous annular core structure, each of the core sections-having a longitudinal groove in one of its sidefaces, the opposite side walls of said grooves being beveled, an annular locking ring having its opposite side faces beveled in relatively opposite directions and the inner face thereof having agreater degree of inclination than the outer face to frictionally coact with the inner walls of the grooves in the core sections when the locking ring is inserted iu said grooves and thereby exert an expanding force against the ring to urge the outer face thereof into tight frictional engagement with theouter walls of said grooves whereby the several core sections are held against relative radial displacement. p

7. A collapsible tire forming core, comprising a plurality of core sections adapted to be assembled to form a continuous annular core, each of the core sections having a longitudinal groove in one of its side faces, the opposite side walls of said grooves being beveled, an annular locking ring having its opposite side faces beveled in relatively opposite directions and the inner face thereof having a greats cegree of inclination than the outer face to frictionally coactwith the inner walls of the grooves'in the core sections when the locking ring is inserted in said groovesand thereby exert an expanding force against the rin to urge the outer face thereof into tight frictional engagement with the outer walls of said grooves, whereby the several core sections are held against relative radial displacement.

25. .ilr. tire forming core comprising a plurality of arcuate sections, hinges inseparably connecting said sections to each other, a key section enacting with certain of the first named sections to position the core sections in circumferential alignment with each other, and means forholding theassembled core sections. against relative displacement.

9. A tire forming core comprising a cylindrical body, having a central web on its inner side extending radially therefrom and substantially circumferentially continuous with the core body, cord end seating flanges projecting from said web at opposite sides thereof intermediate of said body and the inner edge of the web and having their edge faces upon which the marginal edges of'the cord layers are adapted to be engaged, disposed beyond the opposite side faces of the inner portion of the web in s mced relation thereto out of coinciding relation with the planes of the oppositeside faces of the inner portion of said web. 1 f

In testimony that I claim the foregoing as my invention, I have signed my name hereunder.

KNUT O. B, TEXTORIUS. 

